Unreal Engine Issues

Sequencer binding resolve fails in packaged builds for actors in non spatially loaded Level Instances

Editor crashes in FAsyncLoadingThread2::ProcessLoadedPackagesFromGame when Level Blueprint references external actor

Adding a reference to an external actor in the level blueprint causes the package for the actor to be put in the import table of the level. In some cases, the actor package can end up calling postlo ...

The hierarchy of Actors in LevelInstances can break when using BPs as parent

The hierarchy of a LevelInstance actors (Outliner) will break when cooking. The source is the call to AActor::RerunConstructionScripts in FWorldPartitionLevelHelper::MoveExternalActorsToLevel. The ...

LI Property Override: LI internal references are broken when saving the overrides.

When Saving the level, ULevelInstancePropertyOverrideAsset::SerializeActorPropertyOverrides will run UStruct::SerializeTaggedProperties to "diff-serialize" each object against its archetype (the LI ...

Standalone Level Instance with WorldPartition world don't load in editor

A WorldPartition map used as a level instance that's set to standalone mode doesn't load its actors in the editor. ...

LevelInstance Property overrides: Niagara properties cannot be overriden

LevelInstance Property overrides are broken when duplicating a LI

Upon light debugging, it seems like the overrides depend on the name of the actors in the LI. The duplicated LI does have FLevelInstanceActorPropertyOverride but the Actor names were not updated upd ...

Adding a streamed empty LevelInstance in a WP level will result in an incorrect mapcheck error

This is an edge case that can also be caused when a Level only contains actors were `SupportsExternalPackaging` is false.  This is likely the case for the "empty" level which surely contains a Level ...

Children of editor-only actors do not maintain correct transforms when placed inside level instances for PIE and cooked builds

We have found an issue where children of editor-only actors get wrong transforms in PIE and cooked builds when placed inside level instances. This affects both engine version 5.5 and 5.6. The issue ...

A LevelSequence will lose the binding to objects contained in a level instanced inside another level

A LevelSequence will lose the binding to objects contained in a level instanced inside another level on 5.6 and up. Refer to the reproduction steps or the shared repro project provided by the licens ...